Metabolic fate of environmental chemical triclocarban in colon tissues: roles of gut microbiota involved.

Metabolic fate of environmental chemical triclocarban in colon tissues: roles of gut microbiota involved.
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DOI:
10.1016/j.scitotenv.2021.147677
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发表时间:
2021-09-15
期刊:
The Science of the total environment
影响因子:
--
通讯作者:
Zhang G
Zhang G
中科院分区:
其他
文献类型:
--
作者:
Wang G;Zhang H;Zhang J;Sanidad KZ;Yeliseyev V;Parsonnet J;Haggerty TD;Yang H;Ai L;Xie M;Cai Z;Zhang G

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代谢转化对环境污染物和毒物的生物利用度和毒性起着至关重要的作用。然而,以往的研究大多集中在宿主组织中的代谢反应,对肠道微生物区系介导的环境化合物的生物转化研究较少。本文以三氯卡班(TCC)为模型环境化合物,研究了TCC在肠道组织中的代谢去向,确定了肠道微生物区系的作用。我们发现,与其他组织相比,结肠组织具有独特的TCC代谢谱,母体化合物TCC及其自由形式代谢物的丰度较高。利用多种方法,包括体内抗生素介导的肠道细菌抑制、无菌小鼠和粪便细菌的体外培养,我们发现TCC在结肠中独特的代谢特征是由肠道微生物区系的作用所介导的。总体而言,我们的发现支持肠道微生物区系在TCC的结肠代谢中发挥重要作用,强调了考虑肠道微生物区系在环境化合物毒理学评估中的贡献的重要性。
Metabolic transformations play critical roles in the bioavailability and toxicities of environmental pollutants and toxicants. However, most previous research has focused on the metabolic reactions in host tissues, the gut microbiota-mediated biotransformation of environmental compounds is understudied. Using triclocarban (TCC) as a model environmental compound, here we study the metabolic fate of TCC in gut tissues and determine the roles of gut microbiota involved. We find that compared with other tissues, the colon tissue has a unique metabolic profile of TCC, with high abundance of the parent compound TCC and its free-form metabolites. Using a variety of approaches including antibiotic-mediated suppression of gut bacteria in vivo, germ-free mice, and in vitro culture of fecal bacteria, we found that the unique metabolic profile of TCC in the colon is mediated by the actions of gut microbiota. Overall, our findings support that gut microbiota plays important roles in colonic metabolism of TCC, highlighting the importance to consider the contributions of gut microbiota in toxicology evaluation of environmental compounds.
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